Manufacture of gaskets for steam-boilers



(No Model.)

W. T. Y. SGHBNO'K. MANUFACTURE OF GASKETS FOR STEAM BOILERS. 3 .594. Patented Sept. 22, 1885.

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WVILLIAM T. Y. SOHENOK, OF SAL FRANCISCO, CALIFORNIA.

MANUFACTURE OF GASKETS FOR STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 326,594, dated September 22, 1885.

Application filed June 13, 1885. (No model.)

To aZZ whom, it may concern.-

Be it known that I, WILLIAM CRY. SoHENoK, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in the Process of Producing Gaskets for Man and Hand Holes in Steam-Boilers, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to a new method of forming gaskets for man and hand holes in boilers, and for other purposes wherever such gaskets can be used; and it consists of the processes or methods of quickly and cheaply forming gaskets to any size of plates for hand or man holes in boilers, as will be fully de scribed hereinafter.

In the drawings, Figure 1 represents a templet or pattern having the exact size and form for the inside of the gasket, with a strip of sheet-rubber being wound around it to form the size of the gasket. Fig. 2 represents in side view an unfinished gasket removed from the templet, showing its formation from a strip of rubber; and Fig. 3 represents a finished gasket in side or face view. I

A represents a wood templet, around which a strip of sheet-rubber is wound to form the gasket, and is secured to any fixed object by the pins 1 1.

B represents a strip of slieet-rubber, vulcanized or unvulcanized, cut from the edge of a web of rubber, scarfed on opposite sides at each end to an edge, as seen at b, at the beginning of the winding the strip around the plet, and at a at the termination of the str seen in Fig. 2. In so forming a gasketa' a templet one end of the strip of sheet-i cg is secured a little distance from its en' 3 pin, b, to the templet, when the strip is wound around the templet to the point proper cement, like dissolved rubbe' o plied to the outside of the wound st tinuing the cementing and the winding of the strip around and upon its inner turn until the gasket has attained the size and form desired and the scarfed end at a is reaehed,when pins a are forced through the lap into the inner turns, holding the outer lap tightly in its place, so remaining until the cement in all the joints of the strips is firmly set, when the wound gasket is removed from the templet, and is then in the form seen in Fig. 2. If unvulcanized rubber is used, the strips can be held together by metal pins alone.

0 0 represent cloth faces on the sides of the gasket, firmly cemented thereto by any proper cement,such as dissolved rubber, under pressure, and so held until the cement is set or fixed; but cement alone, without the cloth or fiber,will in most cases be sufficient to keep the faces of the gasket in good shape and prevent the strips of rubber from separating.

A gasket, D, so formed is quickly and cheaply produced upon any sized templet without loss of material or time.

Having thus described my invention,what I claim, and desire to secure by Letters Patent, 1s-

The process of forming gaskets of any size or form by winding a scarfed strip of sheetrubber around a tem plet of the proper size and form, and cementing the wound strips together on their edges as they are Wound until the size of the gasket is obtained, and the outer scarfed end of the strip is secured to the body of the gasket by pins or cement, or both, then removed from the templet and cloth cemented he faces, or cement alone applied to the v ut under pressure, substantially r. soHENoK.

2; my signature in 

